Flush-tank-supply system.



NITED I STATES Patented October 20, 1963.

PATENT OFFICE. A

JOSEPH W. NETI-IERY, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO THE NETI-IERYHYDRAULIC VALVE COMPANY, OF INDIANAPOLIS, INDI- ANA, A CORPORATION OFNEW JERSEY.

FLUSHeTANK-SUPPLY SYSTEM.

SPECIFICATION forming part of Letters Patent N0. 741,818, dated October20, 1903.

v Application iiled October ll, 1902. Serial No. 126,829. (No model.)

'To all whom, it may concern.-

Beit known that I, JOSEPH W. NETHERY, a citizen of the United States,residing at Indianapolis, in the county of Marion and State of Indiana,have invented certain new and4 useful Improvements in Flush-Tank-SupplySystems, of which the following is a specification.

The object of my present invention is tov preserve in closediiushing-tanks the requisite supply of air to insure the advantagesincident to the use of an air-cushion in connecwill be automaticallyreplenished.

Referring to the accompanying drawings, which are made a part hereof,and on which similar reference-characters indicate similar parts, Figure1 is an elevation of a iiush-tank Water-supply system embodying myinvention as the same appears when used in connection with an ordinarywater-closet; and Fig. 2 is a central sectional View through the pipesand valves and the immediately-adjacent fragment ofthe tank whichparticularly illustrates my present invention.

The tank 10 is shown as an ordinary cylindrical or boiler-shaped tank.rlhe water-supply pipe 11 may enter at any suitable point, but usuallyfrom the bottom, and this pipe should have near the point of entrance anangle-valVe 12. The iush-pipe 13 leads from the bottom of the tank tothe article to be flushed, as thewater-closet 111, andthe flushing-valve15 is set in at a proper point. This flushingvalve is the subject ofother patents and applications for patents, and not being peculiar to mypresent invention will not be illustrated in detail or furtherdescribed.

In illustrating my invention I have shown a vertical pipe 16, positionedalongside the be effective for the designed purpose.

tank 10 and extending a short distance below it and connected to saidtank at the top and bottom by the two branches 17 and 18. On the lowerend of said pipe 1G is an ordinary check-valve 19. A dotted line placedon the tank 10 (and at the same level across thev pipe 16) indicates thetop of the Water when the tank is charged ready for operation, it beingunderstood that the space below this line is filled with water and thespace above said line with air, the latter being under such compressionas is produced by the water-pressure in the system. The Water-line willof course vary with the amount 'of pressure, which is to be regulatedaccording to the circumstances.

The operation is produced by means of the valve 15, which when openedpermits the water to be discharged from the tank 10 into the closet 14,which it iushes in the ordinaryv manner. The system is so arranged thatwhen the water is discharged the valve will close and the tank willrell. After numerous uses, however, the action is such that the air willbe largely absorbed by the water .and too small a quantity will remainin the tank to By this time the pull of the water in passing out throughthe pipe 13 will have asiphoning action in respect to that contained inthe pipe 16 and will draw it into the tank 10, leaving said pipe 16 freeof the small quantity of water usually contained therein and which formsa Water seal for the check-valve 19 and at the same time holds saidcheck-valve 19 open, so that air will be sucked intherethrough and willpass into the tank, thus replenishing the tank with its proper anddesigned supply of air. This operation will be repeated as often as theair becomes exhausted to too great an extent, and thus the properquantity of air will be continuously automatically maintained.

I have shown below the check-valve 19 a small drip-pan 20, with awaste-pipe 21 lead ing therefrom to carry off any small amount of waterwhich may be discharged at the time the check-valve 19 is opened by theSiphoning action, as above described.

Having thus fully described my said invention, what I claim asnew, anddesire to secure by Letters Patent, is-

1. The combination, in a flushing system, of a hush-tank, a ushi'ng-pipeleading therefrom, a suitable valve thereto, a supply-pipe to said tank,a pipe extending vertically past said tank and connected thereto by twobranches one at the top and the other at the bottom and extendingalittle distance below said tank, and a check-Valve on the lower end ofsaid pipe.

2. The combination, in a flushing system,

of a flush-tank, a flushing-pipe leading therefrom, a suitable Valve tosaid flushing-pipe, a supply-pipe to said tank, a pipe extending from apoint below said ushing-tank up to

